Los Angeles Times – At 32, Walter, an aquatic ecologist, is a rising star among the thousands of scientists who are struggling to map, measure and predict climate change. Parts of her doctoral dissertation on Siberian lakes were published in three prestigious journals in 2007: Science, Nature and Philosophical Transactions of the Royal Society. According to one of her studies, methane emissions from Arctic lakes were a major contributor to a period of global warming more than 11,000 years ago. Video and news story available through the Los Angeles Times.